From the man himself, before shootaround today (which he won't fully participate in):

[My] back is feeling better. I should be ready to go tonight; game-time decision. I'm going to see how it is when I go out there and I should be all right....It feels a lot better, where I'm able to move. [Monday] night it seemed like it locked up on me. But I'm fine now. Hopefully, I'll be playing tonight.

There's much more there on how Rose does not factor the strength of his teammates or the weakness of his opponent into his decision. It's an interesting look at how Rose is an extension of Thibs, and also why he should just sit out: neither knows anything but full-tilt.